redhat: package new file include/opr/lock.h

redhat: package new file include/opr/lock.h

Commit 792dd44ac57032a3f2a4743c83c8a0208a08ecec added the
installation of include/opr/lock.h, but the rpm spec fails
to pick it up, making rpm builds fail. Add the new file
to the files list for the -devel package.

FIXES 134579

Reviewed-on: https://gerrit.openafs.org/13238
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
(cherry picked from commit babf419886d687f8359159f35e8b89aff5e166f8)

Change-Id: I32b6737a6868239c56a604030a49cc45f0379707
Reviewed-on: https://gerrit.openafs.org/13247
Reviewed-by: Mark Vitale <mvitale@sinenomine.net>
Tested-by: Stephan Wiesand <stephan.wiesand@desy.de>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>